Improved blast-regulator



NFETERS. PHOTO-LITHOGRAPHER WASHINGTON D C l is UNITED STATES PATENT Ormea.

IM PROVED BLAST-REGU LATO R.

Specification forming part of' Letters Patent No. 43,856, dated August 16, 1236-1.

section of this invention. Fig. 2 is a plan or' top view of the same. y

Similar letters of reference indicate like parts.

The object ofthis invention is to control the position of the belt which imparts motion to the fan'blower or other blastinachine of a steam-boiler furnace by the pressure of the steam, so that when the steam rises, and the pressure reaches a certain peint, said belt will be thrown off and the motion of the blastmachine stopped, and when the steam goes down the belt will gradually be put on and the blast1nachine started.

The invention consists in combining a lever or rod, the position of which is governed by the opposing action of the weight or spring inone end, and of the steam in the opposite direc'ion, with suitable shafts and a train of wheels or their equivalents, and with the beltshipper which controls the position of the drivingbelt of the blast-machine in such a manner that, according to the higher or lower position of said lever or rod, the position of the wheels is changed and the belt-shipper is moved in one direction or in the other, causing thedriving-belt to be put on when the steam goes down, and taken off when the steam rises.

A represents a lever, which has its fulcrum on a pivot, u., in a standard, b, and is supported by a .flexible diaphragm, B, secured in a suitable box or case, C, and exposed from the inside to the pressure of the steam of a steamboiler. A slip-weight, D, which is adjustable on the lever A, has a tendency to depress the same, and the diaphragm and the position of the lever is thus controlled by the action of the steam and that vof the weight on the diaphragm. It is obvious, however, that instead of the weight a spring might be attached to the lever A, and said lever might be replaced by a rod placed ina vertical or any other dev sirable position, and exposed to the action of the steam in the one and that of the weight or spring in the opposite direction; and I do not wish to confine myself, therefore, to the precise arrangement of parts shown in the drawings.

The loose end of the lever A connects by a link, b, with an arm, c, extending from a rockshaft, d, and another arm, f, which is secured to said rockshaft, and extends from it in a direction at right angles to the arm c, connects by a rod, g, with a strap, E, which is suspended from a shaft, h, as clearly shown in Fig. 1 of the drawing. This strap forms the bearings for the axles ij of two friction-wheels, F G, which mesh into each other, so that any rotary motion imparted to one will be transmitted to the other.

The wheel or pinion F is situated between two shafts, 7c l, which rotate in opposite directions, and which are provided with pinions H I, situated in such relation to the pinion F in the strap E that by pulling said strap in one direction the pinion F is thrown in gear with the pinion l, and by pulling or pushing said strap in the opposite direction the pinion F is thrown in gear with the pinionH. 'lhe motion of the pinion F is thus reversed according to the position of the strap E, which is governed by the rock-shaft d and lever A, or, in reality, by the pressure of the steam.

The shafts k l are geared together by two Y wheels, J K, and motion is imparted to the shaft k by a belt, m, extending round the pulley L. By this mechanism the motion of shaft j, bearing the wheel G, is reversed automatically as the steam rises or falls; and it must bc remarked ythat this mechanism might be changed in various ways without changing the result, and I do not wish to conne myself to the precise mechanism hereinbefore described. This shaft 7' of the wheel G connects by a rope or chain, o, with the belt-shipper, and the ends of this rope or chain are wound in opposite directions round said shaft, so that by rotating the same in one direction the belt of the blast-machine is thrown off, and by rotating said shaft in the opposite direction said belt is put on.

The manner in which the rope o may be arranged and connected to the belt-shipper is indicated in Fig. 1 of the drawings 5 but it is obvious that this arrangement has to be changed according to the position of the beltshipper in relation to the balance of the mechanism, and according to its construction.j

By this arrangement I am enabled to control the blast in a steam-boiler furnace automatically and with the greatest nicety. If the steam rises, the belt of the blast-machine is thrown off. and if the steam goes down said belt is put on.

In order to stop the motion of the shaft lc after the belt has been changed, the rope or chain o passes through a loop, p, at the end of an arm, q, which is firmly connected to a rock-shaft, r, and another arm, s, extending from said rock-shaft in a downward direction, hooks in a rod, g, which connects the rock- Shaft d with the oscillating strap E. If the belt-sl1ipper has reached its eXtreme position in either direction, the strain of the rope or chain on the loop p turns the rock-shaft r slightly round, and by the action of the arm s on the rod g the strap E is brought in a central position and the pinion F thrown out of gear with the pinions H I.

It will be noticed by this arrangement the power necessary to throw the belt of the blastmachine or to cut oft' the blast is derived entirely from an outside source-viz., the belt m, running on the pulley L--the action of the steam on the lever or rod A being employed merely to produce the change in the 2 rfi-3,856

v motion of the mechanism employed forl throwing the belt.

I am aware that ,the action of the steam on the diaphragm has been employed to shift the damper by connecting the lever A directly to lthe damper. In this case the steam is relied to go down.

I claim as new and desire to secure by Letters Patent Regulating the pressure of steam in asteamboiler by the employment or use of an outside power` transmitted by a suitable mediumsuch, for instance, as the belt m-in combination with the lever A' or its equivalent, and

with the mechanism required to change thel motion of the shaft j,' substantially as herein specified, so that the change in the motion Vot" said shaft is produced by the direct action of the steam, whereas the power requisite to throw the belt or shift the cut-oft' is derived from an outside source.

' A. KIPP, Ja.

Witnessesz' J As. P. HALL,

F. MGNAMARA. 

